Window-lock construction



Oct. 26, 1926. 1,604,742

0. M. EDWARDS wnmow LOCK CONSTRUCTION Filed pt. 11, 1924 2 e ts-Shut 1 V EN TOR.

mmm

A TTORNEYS Oct. 26 1926.

v0. M. EDWARDS WINDOW LOCK CONSTRUCTION Filed Sept. 11, 1924 I ZSheets-Sheet 2 INVENTOR. Q m n ATTORNEYS ill) Patented Oct. 26, 1926.

warren STATES OLIVER.M; EDWARDS, OF SYRACUSE, NEW YORK,.ASSIGNOR T0 THEPO. M. EDWARDS COMPANY INC., 0F SYRACUSE, NEW YORK, A-OORPORATION OF INEVT YORK.

WINDOW-LOCK CONSTRUCTION.

Application fi1ed.September 11, 1924. Serial No. 737,203.

This invention relates to windows as windows used in railway cars and vehicles, and more particularly to windows in which no sash counterbalancing means are used, or windows which when not held in elevated position tend to close by gravity, and has for its object a particularly simple and efiioient means by whichthe sash lock coacts with the rack to effect a sliding frictional resistance to retard the dropping ofthe sash and prevent it from coming violently to a stop, and thereby prevent injury to the sash, the sash lock and the rack with which the sash look coacts. i

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed'and described.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is an elevation, partly broken away, of a window sash embodying my invention, the contiguous portion of the rack associated with the window frame being also shown.

Figure 2 is an enlarged fragmentary detail view of a preferred form of rack.

Figure 3 is a sectional view through the rack shown in Figure 2, the position of the bolt of the sash look being shown in dotted lines.

Figure 4f is similar to Figure 2 of anothor form of my invention in which the teeth of the rack are straight.

Figure 5 is similar to Figure 2 in another form in which the teeth of the bolt are bevelled.

Figure 6 is a view; similar to Figure 2 of another form of rack, in which both the teeth of the rack and the teeth of the bolt members are bevelled.

Figure 7 is a fragmentary elevation ofa corner of the sash providedwith a different form of look from that seen in Figure '1; a

and Figure 8 is a sectional view looking to the right in Figure 7 showing the rack and the bolt coacting therewith.

In window sashes, such as are used in railway cars and in which no oounterbalanoing means is used, oftentimes in lowering the window, the bolt comes violently in contact with the abrupt shoulders of the rack, and

suddenly stops the descent of the sash causing injury to the bolt member and also in-.

ury and tearing out the teeth of the rack.

This is true particularly when the trainmen' atthe end of the line are in a hurry, to close all windowsthat are left open by the passengers and slam the windows closed.

This invention comprises the combination of a'window sash having a sash lock provided with a movable bolt member, a window frame including a rack member oo'acting with the bolt member, the teeth of said members being arranged to coaot with sliding frictional resistance to retard the closing movement of the sashbefore thesash comes to a complete stop, so that the sash is pre vented from coming suddenly to a complete art, the rack is usually arranged tohavev teeth 5 arranged obliquely relatively to the plane-of-the sashandthe bolt l moves par- (iii allel to the plane of the sash and has an oblique face 5 arranged to press against the rack. The sash lock may be of any suitable form, size and construction and is here shown as a spring pressed bolt 4 having spaced apa-rt teeth 6, the bolt being operable by apinoh lever 7 arranged in juxtaposition to a stationary handle 8 on the casing 9 of the sash lock.

As shown in Figures 2 and 3, the'rack 2 is formed with rounding teeth 3, the upper half of these teeth constituting a roundingbevel inclined downwardly and outwardly and the lower half constituting a bevel inclining downwardly and inwardly, that is, the apex of the curve'is midway between the base of the tooth. During closing of the window, the operator withdraws the bolt 4 by moving the pinch lever 7 downwardly and if the operator holds this pinch lever 7 in its operative position, he must necessarily let the sash down comparatively'easily, but if he lets go of the handle 7 or gives the sash a down ward push, the sash instead of being stopped while the teeth are riding over the upper half of the tooth of the rack, vbut also while e u r the teeth of the bolt are riding over the lower half of the tooth 3Q V In Figure 4, the rack 11 is shown as formed with teeth 12 having downwardly and outwardly inclined bevelled faces 13 and with asmall abrupt shoulder 15 at the top of each tooth with which shoulder, the bolt 16 finally comes in contact when the sash is slowed down by the braking and ratcheting action of the bolt and rack.

In Figure 5, the rack 17 is shown with abrupt teeth 18 while-the teeth 19 of the bolt 20 are shown as formed with bevelled faces 21 for coacting with the teeth of the rack to effect the braking action,

In Figure 6, both the teeth 22 of the rack 23 and the teeth 2% of the bolt 25 are shown as formed with coacting bevelled faces 26 and 27 which coact inclined plane fashion to effect the braking action.

In Figures 7 and 8, the rack is shown as coacting with a pivoted bolt 28 coacting with a rack 29 formed by corrugating a strip of metal, the rack having rounding corrugations or steps 30. The pivoted bolt 28 is formed with a rounding end 81 coacting with rounding teeth 30 of'the rack 29 and is also formed with a tooth or.

having a sash lock provided with a movable bolt member, a window frame having a rack for coacting with the bolt member to hold the sash at different elevations,'said rack having rounding bevel teeth, and the bolt having a ratcheting movement and a tooth coacting with the teeth of the rack.

2. The combination of a window sash having a sash lock provided with a movable bolt member, and a window frame having a rack for coacting with the bolt member to hold the sash at different elevations, said rack having rounding bevel teeth, and the bolt having a ratcheting movement and spaced apart teeth for coacting with the rack, the teeth of the bolt being spaced apart a sufficient distance to receive a tooth V of the rack between them.

8. The combination of a. window sash having a sash lock provided with a movable bolt member, a window frame having a rack for coacting with the bolt member to hold to enter between the rounding teeth and frictionally coact therewith to frictionally retard movement of the sash before the sash comes to a complete stop.

i 5. The combination of a window sash having a sash lock provided with a bolt member mounted to have a ratcheting movement, a Window frame having a rack for coacting with the bolt member to hold the sash at different elevations, said rack having beveled teeth and the bolt having spaced apart teeth coacting with the teeth of the rack.

6. The combination of a window sash provided with a. movable bolt member, a window frame havinga rack for coacting with the bolt member to hold the sash at different elevations, said member having coacting teeth, the teeth of said member being shaped to act inclined plane fashion on each other to retard the movement'of the sash before the sash comes to a complete stop and the bolt member having a ratcheting action in the same direction as vits operating action and manual means for operating the bolt. In testimony whereof, I have hereunto signed my. name, at Syracuse, in the county of Onondaga, and in the State of New York, this 22nd day of August, 192 1.v

OLIVER M. EDWARDS. V 

